Zotero [zoh-TAIR-oh] is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources. Zotero collects all your research in a single, searchable interface. You can add PDFs, images, audio and video files, snapshots of web pages, and really anything else. Zotero automatically indexes the full-text content of your library, enabling you to find exactly what you're looking for with just a few keystrokes.
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Social Media Relevance Rankings
Social Media Relevance Rankings describe how each site is performing relative to the roughly 600 social media networks KnowEm is currently tracking. A site with a score of 1 is in the lowest percentile for that metric, while a site with a score of 100 is in the highest.
For example, if the site has an Alexa relevance ranking of 10, that means it is ranked lower than 90% of the other social media networks. A site with a relevance rank of 90 is scoring higher than 90% of the others.